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Studi Finite Element Analysis terhadap Kekuatan Struktural Dua Desain Roda Kereta Menggunakan ANSYS Workbench 17.2 Davareza, Tinton; Ganda, Andita Nataria Fitri; Wulandari, Diah; Mubarok, Dio Dwi; Firmansyah, Ganda Putra
Jurnal Rekayasa Mesin Vol 10 No 03 (2025): JRM Desember 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v10i03.73974

Abstract

Roda kereta merupakan komponen vital dalam sistem perkeretaapian yang harus mampu menahan beban operasi secara aman dengan deformasi dan konsentrasi tegangan yang terkendali. Penelitian ini bertujuan untuk mengevaluasi dan membandingkan performa struktural dua desain roda kereta melalui pendekatan Finite Element Analysis (FEA). Analisis dilakukan menggunakan ANSYS Workbench 17.2 dengan memodelkan kontak roda dengan rel menggunakan tipe kontak frictionless agar kondisi batas lebih merepresentasikan kondisi operasi nyata. Material yang digunakan adalah baja karbon ASTM A36 sebagai pendekatan baseline, dengan pembebanan vertikal sebesar 110.362,5 N yang merepresentasikan setengah beban gandar jalur rel kelas I. Parameter evaluasi meliputi tegangan ekuivalen Von Mises, total deformasi, dan safety factor. Hasil simulasi menunjukkan bahwa Model B memiliki performa struktural yang lebih baik dibandingkan Model A, ditunjukkan oleh tegangan maksimum yang lebih rendah (160,82 MPa dibandingkan 195,19 MPa), deformasi maksimum yang lebih kecil (0,029245 mm dibandingkan 0,045356 mm), serta nilai safety factor minimum yang lebih tinggi (1,3742 dibandingkan 1,1322). Perbedaan kinerja ini dipengaruhi oleh variasi geometri, khususnya pada web plate, radius transisi, dan distribusi massa roda. Penelitian ini memberikan kontribusi berupa pemahaman pengaruh geometri terhadap respons struktural roda kereta dan dapat digunakan sebagai dasar evaluasi awal desain roda kereta menggunakan pendekatan FEA.
PEMBUATAN CETAKAN SENDOK PUDING DENGAN INJECTION MOLDING DARI MATERIAL POLYLACTIC ACID (PLA) DAN PATI SINGKONG Al Fath Hasby Ash Shiddiqy, Yhun; Ganda, Andita Nataria Fitri; Wulandari, Diah; Arifianti, Lailatus Sa'diyah Yuniar
Jurnal Rekayasa Mesin Vol 10 No 03 (2025): JRM Desember 2025
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v10i03.74386

Abstract

Plastic is widely used in Indonesia, but its non-biodegradable nature causes accumulation and environmental pollution. As a solution, more eco-friendly bioplastics have been developed. This study aims to produce and analyze pudding spoon molds made from Polylactic Acid (PLA) and cassava starch using the injection molding method. The process began with product and mold design using Autodesk Fusion 360 with product dimensions of 125.5 × 25.2 × 2 mm and mold dimensions of 132 × 60 × 35.6 mm. Mold Flow simulation was conducted to analyze parameters such as fill confidence, visual defects, warpage, air traps, and deflection. The mold was manufactured using CNC machining with aluminum 5052 material. The PLA and cassava starch mixtures were varied, heated at a mold temperature of 160 °C and injection temperature of 190 °C, with a cooling time of approximately 5 minutes. The comparison between simulation and actual results showed dimensional differences for each material variation. The largest deviation occurred at a ratio of 40% PLA and 60% cassava starch, reaching 14.9%, while the best result was obtained at a ratio of 50% PLA and 50% cassava starch with only 0.72% deviation from the initial design. This study indicates that material composition significantly affects the dimensional quality of bioplastic products produced through the injection molding process.
Rancang Bangun Mesin Uji Abrasi Material Alumunium Terhadap Pelumasan Oli Eko Saputra, Aditiya Wahyu; Wulandari, Diah; Sakti, Arya Mahendra; Puspitasari, Dewi
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abrasion is a common wear mechanism that occurs in machine components due to repeated frictional contact, particularly in aluminum materials that are widely used because of their light weight and corrosion resistance. Nevertheless, aluminum remains susceptible to wear when the lubrication system does not perform optimally. This study aims to design and develop a laboratory-scale abrasion testing machine and to analyze the effect of rotational speed on the wear behavior of aluminum 6061 under oil lubrication. The research employed a research and development method consisting of design, fabrication, assembly, functional testing, and abrasion testing stages. Abrasion tests were conducted at rotational speeds of 500, 1000, and 1500 RPM with a constant load of 3 kg, a test duration of 30 minutes, and Shell SAE 10W-30 oil as the lubricant. Quantitative data were obtained from the measurement of specimen mass loss before and after testing, while qualitative analysis focused on machine performance and operational stability during testing. The results indicate that the developed abrasion testing machine operated properly and was capable of producing consistent wear data. The mass loss of aluminum specimens increased with higher rotational speeds, with the highest average wear observed at 1500 RPM. This study contributes by providing a simple and cost-effective abrasion testing machine for laboratory applications and by offering insights into the influence of rotational speed on the wear behavior of aluminum under lubricated conditions.
Redesign of A Cake Batter Mixing Machine Using A Stepped Pulley Ramadhan, Rafli Rizki; Riandadari, Dyah; Wulandari, Diah; Sofi, Nurul Ainu
Madani: Jurnal Ilmiah Multidisiplin Vol 4, No 1 (2026): February 2026
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.18507000

Abstract

One of the key elements in making high-quality sponge cake batter is consistent and precise mixing, ensuring all ingredients are well-blended and producing the air bubbles necessary for softness. The aim of this machine redesign was to overcome the limitations of the previous design by using a multi-stage pulley. By redesigning the machine, it can be tailored to more specific operational needs, improve product quality, and minimize wasted time. To achieve this goal, the sponge cake mixer, which previously used a fixed-size pulley system, was updated to be more efficient in regulating rotation speed. Therefore, research was conducted by replacing the pulley size variations with a 5-inch diameter with 840 rpm, 6 inches with 700 rpm, and 7 inches with 600 rpm. During the testing process, the dough was mixed and the time required until the dough was ready was recorded.Based on the results of the trial using a multi-level pulley, it was found that the average time for mixing sponge cake batter with a 5-inch pulley produced an average time of 37 minutes, while a 6-inch pulley produced an average time of 46 minutes, and for a 7-inch pulley produced an average time of 55 minutes. A 5-inch diameter pulley is the appropriate size for use in a redesigned sponge cake batter mixer machine because it produces the fastest mixing time, which is an average of 37 minutes, with a rotation speed of 840 rpm. This pulley size is able to increase the efficiency of production time without reducing the quality of the dough mixing results
Analisis Komposisi Bahan Bakar Terhadap Proses Pembakaran pada Kompor Berbahan Bakar Oli Bekas Mubin, Moh. Nurul; Riandadari, Dyah; Wulandari, Diah; Nugroho, Aji
Madani: Jurnal Ilmiah Multidisiplin Vol 4, No 1 (2026): February 2026
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.18437715

Abstract

Waste management issues have become a national concern with serious impacts on social, economic, health, and environmental aspects. The low level of awareness among communities and industrial actors in managing waste has contributed to environmental pollution. Along with the development of cities and regions, the volume of waste including used lubricating oil from vehicles and motorized machinery continues to increase. Not only in large cities, but small workshops in rural areas also generate used oil waste, resulting in its widespread distribution across Indonesia. This study employed a field experimental method. The approach was conducted by testing fuel mixture compositions in a stove fueled by used oil to observe the effect of fuel composition on the combustion process. The results indicate that variations in fuel composition significantly affect combustion quality. In the mixture of used oil and kerosene, a ratio of 40:60 produced the highest flame temperature of 378°C, the fastest cooking time of 4.05 minutes, and a blue flame indicating more optimal combustion. In contrast, the 60:40 mixture resulted in the lowest temperature of 318°C, the longest cooking time of 5.07 minutes, and a predominantly orange flame. For the mixture of used oil and biodiesel (biosolar), the 40:60 ratio also demonstrated the best performance, achieving the highest flame temperature of 380°C, the fastest cooking time of 3.52 minutes, and a stable blue flame.
RANCANG BANGUN MESIN PENCACAH RUMPUT GAJAH UNTUK PROSES PEMBUATAN SILASE PAKAN TERNAK SAPI Genta Arya Rahma Mahendra, Genta; Wulandari, Diah; Utama, Firman Yasa; Widoretno, Yustin Setiya
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v11i01.75196

Abstract

Silage is a method of providing cow feed that requires a forage chopping process so that it is easy to ferment and has a longer shelf life. However, most breeders still do the enumeration manually, so it takes a long time and the size of the enumeration is not uniform. Therefore, this study aims to design an elephant grass chopper with dual input and output funnels, equipped with a knife and a beater to speed up cutting and crush harder materials. This machine is expected to be able to produce a uniform size of 2–5 cm according to the SNI 7785.1:2003 standard This research method uses a 4D Research and Development (R&D) model to design and test a elephant grass chopper. The stages include literature review, design, machine construction and assembly, and then functional testing using elephant grass as the test material in three trials. The test data is analyzed to assess the machine's performance and feasibility. The results of the study show that the designed elephant grass chopper can operate well. Based on the function test at 1500 rpm with a test material load of 5 kg, the machine produces a chopping size of 2–5 cm with a working capacity of 92 kg/hour, so it is considered suitable for use to support the process of making silage for cattle feed and increase efficiency compared to manual methods.
Peningkatan Hasil Belajar IPAS melalui Flipbook Ancient Treasures Unlocked di SD Kelas IV Octaura, Mega Raisya; Al Djumariah, Dhea; Wulandari, Diah; Hanifah, Nasywa; Rahayu, Sri
Jurnal Pengajaran Sekolah Dasar Vol. 5 No. 1 (2026): Jurnal Pengajaran Sekolah Dasar
Publisher : EDUPEDIA PUBLISHER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56855/jpsd.v5i1.1880

Abstract

Pembelajaran IPAS pada materi peninggalan sejarah di sekolah dasar masih menghadapi kendala berupa keterbatasan media pembelajaran yang menarik dan interaktif yang berdampak pada hasil belajar siswa. Penelitian ini bertujuan untuk meningkatkan hasil belajar IPAS melalui penggunaan media flipbook digital “Ancient Treasures Unlocked”. Penelitian menggunakan metode kuantitatif dengan dengan desain Penelitian Tindakan Kelas (PTK) model Kurt Lewin yang dilaksanakan dalam 4 tahap: perencanaan, tindakan, pengamatan, dan refleksi. Subjek penelitian ini adalah 19 siswa kelas IV di SDN Sindangraja. Hasil penelitian menunjukkan peningkatan belajar siswa sebesar 53%. Temuan ini membuktikan bahwa kombinasi media flipbook interaktif dan model PjBL tidak hanya meningkatkan hasil belajar saja, namun juga terbukti mendorong keterlibatan aktif serta pemahaman siswa di dalam pembelajaran. Dengan demikian, media flipbook digital interaktif “Ancient Treasures Unlocked” yang diintegrasikan dengan PjBL direkomendasikan sebagai alternatif media pembelajaran IPAS yang efektif untuk meningkatkan hasil belajar siswa sekolah dasar.
HUBUNGAN KEKERABATAN BAHASA JAWA LAMPUNG TIMUR DAN BAHASA MINANG RIAU: KAJIAN LINGUISTIK KOMPARATIF Wulandari, Diah; Wiyanti, Sri
Jurnal Basataka (JBT) Vol. 9 No. 1 (2026): Juni 2026
Publisher : Prodi Pendidikan Bahasa dan Sastra Indonesia, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/basataka.v9i1.1370

Abstract

Penelitian ini bertujuan untuk mengkaji hubungan kekerabatan antara Bahasa Jawa Lampung Timur (BJLT) dan Bahasa Minang Riau (BMR) dalam kerangka linguistik komparatif. Kedua bahasa tersebut menarik untuk dikaji karena sama-sama berkembang di luar wilayah asal penuturnya, sehingga berpotensi mengalami dinamika kebahasaan yang berbeda. Penelitian ini menggunakan pendekatan deskriptif dengan metode komparatif yang memadukan analisis kualitatif dan kuantitatif. Data penelitian berupa 100 kosakata dasar Swadesh yang diperoleh dari penutur asli masing-masing bahasa melalui teknik simak dan cakap. Hasil penelitian menunjukkan bahwa BJLT dan BMR memiliki 17 kosakata kerabat dengan persentase kekerabatan sebesar 17%. Berdasarkan kriteria leksikostatistik, persentase tersebut menempatkan BJLT dan BMR pada tingkat satu rumpun bahasa. Temuan ini menunjukkan bahwa meskipun berada dalam rumpun bahasa yang sama, kedua bahasa tidak memiliki hubungan kekerabatan yang dekat secara leksikal.
Co-Authors ', Usman 'Ilmi, Muhammad Iklil Ulil Adam, Fian Adidya Adham Rifai, Hasif ADIYANTORO, ARI Afghan, Fayyadh Buddy Al AFIF HIDAYAT, AHMAD Afifah, Hidayanti Nuzulatul Aji Nugroho Akbar, Mokhamad Rizky Al Djumariah, Dhea Al Fath Hasby Ash Shiddiqy, Yhun Alam, Ilham Rofiqul Alfadilla, Muhammad Fajar ALFIANTO, RENDI Amalia, Sefi AMNA, MUSTAFID Anatri Desstya Andrian Andrian Arifianti, Lailatus Sa'diyah Yuniar Arruafy, Mohammad Ghithrof Arya Mahendra Sakti Atiqoh, Nisrina Bayu Kurniawan Bin Laday, La Dedy Augustino Cahyo Nugroho, Cahyo Chinsa, Iqbal Rifky Davareza, Tinton Dewanti Handayani, Sri Sularti Dewi Puspitasari Dyah Riandadari Eko Marsyahyo Eko Saputra, Aditiya Wahyu Fachry Abda El Rahman FARADILLA FIRDAUSY, MEUTIA Farizi, Aziizun Faiq Al Fatahillah, Idham Rizki Yusma Febrianto, Andrie Seva Ferly Isnomo Abdi Fikri, Zainur Rijalul Firdaus, Oktavian Bachtiar Firiski, Edwi Febrian Firman Yasa Utama Firman Yasa Utama Firmansyah, Ganda Putra Firmansyah, Rian Ganda, Andita Ganda, Andita Nataria Fitri Gegatama, Muhammad Henwa Genta Arya Rahma Mahendra, Genta Hanifah, Nasywa Hartuti Purnaweni Hermawan, Dedy Andy Hudaya, Adam Aryadana Irfa’i, Mochamad Arif IRFAN MAULANA, MUHAMMAD Irwandy Syofyan Kusuma, Muhammad Dewantara Kusuma, Rachmad Andrian Jaya Manggalasari, Lena Citra MARTINO, SANDI Marzad, Deftana Aqsya Mubarok, Dio Dwi Mubin, Moh. Nurul Muhammad Riza Hafizi Mujakki, Muhammad Akbar Murti, Dafa Aditya Naqsyabandi, Ananda Rafly Naufal, Bayu Ahmad Nosuvian, Joko Laksono Novi Resmini Nur, Muhammad Baihaqi Nurhadi, Jatmika Octaura, Mega Raisya Octavianissa, Icha Nur Pata Ledi, Simon Aten Prasetyo, Rafly Budi Pratama, ceisaleo Pandu PRATIYAS, FANDI Putri, Annisa Rizqika Hermalia Putri, Danisha Yoananda Rachma Hasibuan Rachmanda, Reza Irfani Rachmattan, Ryan Rahman, Riandito Auki Minanda Rakhman, Abdullah Ramadhan, Aldhi Fahrezy Ramadhan, Rafli Rizki Ramadhani A, Gilang Ridho, Mukhlis Yazid Rochaman, Nur ROHMADANININGSIH, LINDA ROUDHOTUL HARIRIN, SITI Rusli, Ghozy Meiky Ryandadari, Dyah Saputra, Prihatama Wahyu Sedjati, Moch. Ari Wibowo Shadiq, Muhammad Difa Ash Sofi, Nurul Ainu Sri Endah Wahyuningsih SRI RAHAYU Sri Wiyanti Sudana, Undang Sulistyorini, Elisa Suryonegoro, Satrio Adi Sutriyono Titik Djumiarti Toni Prahasto Trimanah, Trimanah Trimariyono, Dimas Ubaidillah, Moch. Rizal Vincencius Gunawan, Vincencius WARJU Widiyanti, Prastiwi Wahyu Widoretno, Yustin Setiya Winoto, Roy Ariel Wulandari, Cyndhi Kartika Yuda, Mohammad Wira Yulianto, Angki Narda Zainal Abidin